In the 21st century of electronic information age, mobile phones are more and more inseparable in our daily life. In the mobile device market, cellphone plays an increasingly important role, which shows that the future market of mobile phones will be broader and broader. With the constant change of consumer's consumption concept, the corresponding demand for mobile manufacturing industry is also getting higher and higher.The processing of phone parts have also changed from traditional machining to laser technology.
In the manufacturing process of each mobile phone, there are many laser processing technologies.
1.Laser marking
Laser marking is a very common equipment in the laser industry. It uses high capacity laser to irradiate the workfield to vaporize the surface material or change the color of the chemical reaction, thus leaving a permanent marking method. It has the characteristics of high accuracy, high speed and clear marking. Laser marking is a permanent marking method for mobile phones, which can improve the anti-counterfeiting ability and add commercial value, making the products look higher grade and more brand sense.
For example: Logo marking, cell phone keys, cell phone shell, cell phone batteries, cell phone accessories marking and so on, even in your invisible place, there are parts laser marked on cell phone.
2.Laser drilling
Mobile PCB laser drilling is divided into hole and blind-hole, which belongs to the cutting-edge application in semiconductor field.
Early times mechanical drilling mode was used on mobile phone. After the test of laser technology,labor cost is greatly reduced by its high cutting quality and high efficiency. Laser technology has the characteristics of maintenance-free, easy operation, non-contact processing of consumables, less production costs. It is undoubtedly the best choice for manufacturers to shorten the production cycle, save costs and realize the process of industrial automation. The advantage of laser drilling is that the hole diameter of drilling is smaller, and no need for one-time shaping of subsequent processing.
3.Laser cutting
Laser cutting technology is mainly used for shell cutting, screen glass cutting and screen cutting. Many companies used to apply one-time forming technology and mechanical processing however. For example, the shell of Apple mobile phone is stamped on a whole thick aluminium alloy material and removed layer by layer to retain that piece. In addition, there are also precise cutting using UV ultraviolet laser technology, mainly cutting FPC soft board, PCB board, hard and soft bonding board and cover film laser cutting window and so on.
4.Laser welding
Welding technology is mainly used in mobile phone backplane welding. High-energy laser beam is used to melt and solidify the material surface into a whole. The size of heat affected zone, weld beautifulness and welding efficiency are important indexes to judge the welding process.
Batteries became the main culprit of Samsung Note7 explosion, however.......
Let's look at a recent hot news. On January 23, nearly five months later, Samsung officials finally announced the reasons behind the explosions on its flagship cell phone, Galaxy Note 7: batteries.
Exactly, it's the battery. Samsung has tested more than 200,000 well-assembled mobile phones and more than 30,000 batteries, further clarifying the root cause of the problem. Samsung Mobile President Gao Dongzhen said at the release meeting that Note 7 battery size does not match the battery bunker, there are design and manufacturing defects, resulting in overheating of the battery, which ignited and exploded.
Defect Diagram of Battery Manufacturing Design
In the structure of lithium batteries, there is an isolation film between the positive and negative electrodes. Usually, the short circuit is due to the damage of the isolation film. Samsung's analysis confirmed that the first recall and the second analysis of A and B batteries, A batteries are mainly negative plates received pressure.
The inspection results confirm that it is due to the problem of ultrasonic welding technology that leads to excessive burrs, breaks through the insulating tape and isolation film, and eventually leads to short circuit.
A major disadvantage of lithium-ion batteries is that lithium can explode when exposed to air, especially when exposed to water. However, if laser welding technology is chosen, these accidents may be avoided. In recent years, laser welding technology has become an effective way to improve the quality of batteries.
Laser welding is a non-contact process with high reliability, high speed, high precision and environmental protection requirements. During the welding process, the laser power increases continuously at the beginning and then runs along the calculated trajectory. Laser power gradually decreases to the initial value at the end of welding and overlaps with the beginning of welding, so as to ensure smooth and flat welding. In order to obtain the performance advantages of lithium batteries, the use of high power laser can achieve the required flexibility and accuracy, so as to obtain a perfect gas seal in the manufacture of batteries, improve the safety of battery manufacturing, improve battery processing technology, and ensure the safety of batteries in various harsh environments.
Laser technology used in mobile phone manufacturing process is very extensive. Its technology is not only limited to the listed in the small edition, but also more advanced laser technology, such as resistance adjustment, splitting, activation and so on. Of course, laser technology is not only used in mobile phone manufacturing technology, but also in other laser technology applications, and listen to the next decomposition.
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